diff --git a/CMakeLists.txt b/CMakeLists.txt
index 73617ca..87fe91e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required (VERSION 3.7)
 project (mastodon-cpp
-         VERSION 0.12.0
+         VERSION 0.12.1
          LANGUAGES CXX
 )
 
diff --git a/src/mastodon-cpp.cpp b/src/mastodon-cpp.cpp
index cf64667..c124714 100644
--- a/src/mastodon-cpp.cpp
+++ b/src/mastodon-cpp.cpp
@@ -129,7 +129,7 @@ const curlpp::Forms API::maptoformdata(const parametermap &map)
     return formdata;
 }
 
-const std::string API::urlencode(const std::string &str) const
+const std::string API::urlencode(const std::string &str)
 {
     return curlpp::escape(str);
 }
diff --git a/src/mastodon-cpp.hpp b/src/mastodon-cpp.hpp
index 62178d1..b9c379d 100644
--- a/src/mastodon-cpp.hpp
+++ b/src/mastodon-cpp.hpp
@@ -274,7 +274,7 @@ public:
      *
      *  @return The percent-encoded string
      */
-    const string urlencode(const string &str) const;
+    static const string urlencode(const string &str);
 
     /*!
      *  @brief  Register application, step 1/2